diff --git a/res/doc/usage_en.txt b/res/doc/usage_en.txt
index fe34005b428954e12410ec8b63ddeac9568de7b7..24c1639c80dfddc61bc3b7504c25cb06dc73ab5e 100644
--- a/res/doc/usage_en.txt
+++ b/res/doc/usage_en.txt
@@ -12,6 +12,7 @@ Parameters
 
   -F  --field      This parameter can be used to specify the fields, separated by commas. The default is all fields.
   -t  --table      If the output format is sql, using it to specify the table name to insert data to.
+  -T  --trim       Remove the prefix and postfix of every field when output data.
   -H  --human      Output a readable format, print the field name, and use the tab key to split.
 
   -r  --recursive  Recursive mode. The default mode is parallel, in which each field loops independently.
@@ -43,6 +44,7 @@ $>zd.exe -d demo/default.yaml -c demo/test.yaml -n 100 -o test.txt   # Output da
 $>zd.exe -d demo/default.yaml -c demo/test.yaml -n 100 -o test.json  # Output data in JSON.
 $>zd.exe -d demo/default.yaml -c demo/test.yaml -n 100 -o test.xml   # Output data in XML.
 $>zd.exe -d demo/default.yaml -n 100 -o test.sql -t user -s mysql    # Output the sql inserted into the table user.
+$>zd.exe -d demo/default.yaml -o test.sql -t user -s mysql --trim    # Remove the prefix and postfix of every field.
 
 $>zd.exe -i db.sql -o db  # Generate YAML files for each table by parsing db.sql and store them in the db directory.
 $>zd.exe -c demo/default.yaml -i test.txt --decode  # Parse the file specified by -i according to the config of -d.